year =2020
month=2
if month in [1,3,5,7,8,10,13]:
    print("%d月有31天"%month)
elif month in [4,6,9,11]:
    print("%d月有30天"%month)
elif month ==2:
    if year % 400 == 0 or year % 4 == 0 and year % 100 !=0:
        print("%d年%d月有29天"%(year,month))
    else:
        print("%d年%d月有28天"%(year,month))